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<p><span style="color: rgb(85, 85, 85); font-family: Varela, Arial, Helvetica, sans-serif; font-size: 14px; letter-spacing: 0.5px;">Simple psychrometer to measure water vapor in the atmosphere, on a percentage scale known as Relative Humidity (%RH). Includes table to calculate the difference between the wet and dry bulb temperature to give the %RH reading</span></p>
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